Pre-Calulus
for a person who drives his car 15000 miles a year trading in a car that gets 15 miles per gallon for a car that gets 18 miles per gallon (a 20% increase) will save them how many gallons of gas each year?August 31, 2016

Math
Three seta of lights blink after 6 seconds, 8 seconds and 12 seconds respectively. What is the least number of seconds it would take for the lights to blink together.June 20, 2016

algebra
The volleyball team at West View High School is comparing T-shirt companies where they can purchase their practice shirts. The two companies, Shirt Box and Just Tees, are represented by this system of equations where x is the number of T-shirts and y is the total cost of the T...May 23, 2016

Math
Tim has a rose garden that is three times as long as it's wide. the total length around the garden is 80 feet. tim wants to line the exterior of the garden with paver stones. each paver stone is 2 feet by 2 feet in area. 1) area of the rose garden 2) number of paver stones...September 17, 2015

Thermodynamics
Gas is contained in a n 8L vessel at a temperature of 20¡ãC and a pressure of 9atm. a)Determine the number of moles of gas in the vessel. b) How many molecules are there in the vessel?August 27, 2015

statistic
Two samples each of size 25 are taken from independent populations assumed to be normally distributed with equal variances. The first sample has a mean of 35.5 and standard deviation of 3.0 while the second sample has a mean of 33.0 and standard deviation of 4.0. The pooled (i...March 17, 2015

english
Learning is to sail challenging and exhilarating it is also not the easiest thing to do. is this sentence a dangler sentence.February 22, 2015

Statistics
In a study of pleas and prison sentences, it is found that 40% of the subjects studied were sent to prison. Among those sent to prison, 20% chose to plead guilty. Among those not sent to prison, 10% chose to plead guilty. 3.3.a (0.5 pt) If a study subject is randomly selected...February 6, 2015

Thermodynamics
The active element of a certain laser is made of a glass rod 30cm long by 1.5cm in diameter. If the temperature of the rod increases by 65¡ãC, what is the increase in: a) Its length? b) Its diameter? and c) Its volume? Assume the average coefficient of linear ...December 13, 2014

Organic Chem
4 KO2 + 2CO2 rightwards arrow 2 K2CO3 + 3 O2 How many moles of O2 can be produced from 12 moles of KO2 and 10 moles of CO2? If you were to produce 100.0 grams of O2 what would be the percent yield of the reaction?November 14, 2014

Physics
a place kicker must kick a football from a Lint 36 meters from the goal. As a result of the kick, the ball must clear the crossbar, which is 3.04 meters high. When kicked, the ball leaves the ground with a speed of 20 meters per second at an angle of 50 degrees to the ...November 2, 2014

physics
a projectile is fired at 50 meters per second at an angle of 30 degrees below the horizontal off a cliff that is 50 meters high. How far away and at what speed and angle will this projectile land?November 2, 2014

math
18 sections of fence each 1 meter long. What are the various sizes of rectangular pens using all 18 units of fence?October 23, 2014

Chemistry
If the density of ocean water at depth of 10,000m is 1.071g/ml and if 25.0g of water at that depth contains 190mg of KCl what is the molarity of KCL?October 12, 2014

Algebra
mark can paint the fence in 40 minutes and manny can paint the fence in 30 minutes together how long will it take to paint the fenceSeptember 7, 2014

Statistics
Suppose you are given data from a survey showing the IQ of each person interviewed and the IQ of his or her mother. That is all the information you have. Your boss has asked you to put together a reportMay 14, 2014

Physics
Really need help with this asap plz~ there is a 4kg wooden block on top of a wooden ramp forming an angle of 37 degrees above surface.The block is placed 1.2 m up on the ramp and the ramp is connected to another wooden flat board.So when the block slides down, it continues a ...December 8, 2013

Strayer university
Suppose that the Fed's inflation target is 2%, potential output growth is 3.5%, and velocity is a function of how much the interest rate differs from 5%: %^V= 0.5 X (i-5). Suppose that a model of the economy suggests that the real interest rate is determined by the ...December 16, 2012

chemistry
#1 A pipet delivers 10.5, 10.3, 10.9 and 10.7 ml (a) find the mean volume and deviation from the mean for each and calculate the average deviation from the mean (b) calculate the relative deviation (in %) for this set of data. Relative deviation (%) = (average deviation from ...December 10, 2012

chemistry
#1 A pipet delivers 10.5, 10.3, 10.9 and 10.7 ml (a) find the mean volume and deviation from the mean for each and calculate the average deviation from the mean (b) calculate the relative deviation (in %) for this set of data. Relative deviation (%) = (average deviation from ...December 10, 2012

economics
Over the last 30 years in the United States, the realprice of a college education (i.e., after adjusting for inflation) has increased by almost 70 percent. Over the same period, an increasing number of high school grad- uates have sought a college education. (Nationwide ...April 20, 2012

Physics
A load of 47 N attached to a spring that is hanging vertically stretches the spring 0.22 m. What is the spring constant?February 16, 2012

Physics
When a mass of 21 g is attached to a certain spring, it makes 16 complete vibrations in 4.4 s. What is the spring constant of the spring? Answer in units of N/mFebruary 16, 2012

physics
A harmonic wave is traveling along a rope. The oscillator that generates the wave com- pletes 48.0 vibrations in 25.8 s. A given crest of the wave travels 413 cm along the rope in a time period of 10.5 s. What is the wavelength? Answer in units of mFebruary 16, 2012

college biology
In testing synaptic transmission, you found that there were 300 failures in 1000 trails of stimulating a presynaptic neuron. The average EPSP size was .7 mV +/- .2mV (mean +/- SD), and the average 'mini' EPSP size was .6mV +/- .1mV. Does the synapse obey Poisson stati...October 12, 2011

College biology
In testing synaptic transmission, you found that there were 300 failures in 1000 trails of stimulating a presynaptic neuron. The average EPSP size was .7 mV +/- .2mV (mean +/- SD), and the average 'mini' EPSP size was .6mV +/- .1mV. Does the synapse obey Poisson ...October 8, 2011

reading
I have a foster child (my niece) who has been through a lot in the past year. She is having huge difficulty in school. She is in 1st grade. My 21 year old daughter is home with her trying her best to help her but it is getting overwhelming to get her to look at words to learn ...October 7, 2011

math\
2. A data set consists of a set of numerical values. Which, if any, of the following statements could be correct? a. There is no mode. (True or False) b. There are two modes. (True or False) c. There are three modes. (True or False)August 13, 2011

statistics
1. Find the mean, median, and range for each of the two data sets? 2. Find the standard deviation using the rule of thumb for each of the data sets. 3. Compare the two sets and describe what you discover. The following data sets shows the ages of the first seven presidents (...August 13, 2011

Economics
Unable to find any info to answer my question I recently posted about.. role of economic theory in the way economics are run today & no clue found as to concrete examples of same...went through all your sites you suggested and looked many, many sites involving economic theory...July 27, 2011

Economics
What is the role of economic theory in the way economies are run today? Give some concrete examples.July 27, 2011

History-Civil War
Thank You, I must comment to all at Jiskha, all the time you put in, in answering all those questions. You are all special and dedicated people in doing this.July 12, 2011

History-Civil War
To Damon, if available, this is my last question in this subject..for me very confusing..don't know where to start or what I'm looking for. Do you see an overall vision, or approach to command and strategy, in Ulysses S. Grant's actions as overall military ...July 12, 2011

history-Civil War
Upon retreating from Petersburg, were there any options open to Lee that might have prolonged the War? Please chech if my answer is correct... No, Lee retreated from Petersburg and attempted to link up with the remnants of Confed. Gen. Johnson's defeated army in order to ...June 30, 2011

History-Civil War
I already was on that site you gave me...no..I'm looking tooo hard, it could be right under my nose and I don't even know it. I look up for HRS. I have a hard time absorbing this subject..I always did. Thank You for your time anyway.June 28, 2011

History-Civil War
1865: Marching through Georgia In terms of supply, how was Sherman"s march different than other Civil War campaigns? What I found was..Sherman telegraphed President Lincoln, asking him as a gift to Savannah, he would need 150 guns along with plenty of ammunition...also ...June 28, 2011

History-Civil War
Of the Union Generals covered in the course through 1863, who was considered the worst? The.. site you gave me in the past was of no help at all...was mostly timelines..I came up with George B. McClellan ???????June 19, 2011

History-Civil War
To:Damon..His little bit of written info really helps me to complete my essays....New question...Was there an opportunity for the confederates to win during any day of Gettysburg? Identify & analyze the opportunity, and show how the South could have won...Have been working on ...June 18, 2011

History-Civil War
Damon..you explain it well !:) This is one subject I always had a hard time absorbing...doing my best..your help is again appreciated in helping me to continue on this subject...Thanks again!June 18, 2011

social studies
What was the greatest obstacle that the Union army faced at Vicksburg, and how did they overcome it? I read so much on this ...were hills, surrounded by flooded marshlands & waters..army couldn't get through by foot..can't find a full explanation of this & how did they...June 18, 2011

social studies
Almost done ..What are two of the qualities that made Stonewall Jackson an outstanding battlefield Commander ? The only thing I found on this was, he inspired incredible loyality in his men and was a brillant stratigist ?? Is this correct ?June 15, 2011

social studies
Here goes..now I'm really upset with all this....New question..I need something to guide me...How did the changing command situation of the Army of the Potomac influence Gettysburg ? Also, did the elevation of George Gordon Meade make the Union victory more or less likely...June 14, 2011

social studies
Oh Boy ! This is really confusing me now ! Was trying to read up on this..many many sites..will continue to do so, including your listed site...Thank you so much to you and Raymond on this one ! Don't know if I could really understand this to write up on it...dont want to ...June 14, 2011

social studies
Was there an opportunity for the confederates to win during any day of Gettysburgh ? How could the South have won ??June 14, 2011

social studies
Battle of Chanellorsville 1863....of all the battles fought by Robert E. Lee through 1863, this battle was his most impressive victory...am I correct ?June 14, 2011

social studies
Please correct me if I'm wrong....Of the Union generals covered in the course through 1863, who do you consider the worst ? I say ...Gen. George B. McClellan ?June 13, 2011

social studies
Yes Ms. Sue, this is what I've been looking for, I'm on the right track...just wanted to make sure so I'm not writing about the wrong thing here.Thank You !June 11, 2011

social studies
What political dangers did President Lincoln face when he issued the Emancipation Proclamation..I don't think Damon was able to help me or I'm looking at the question the wrong way ?Need your input on this Ms.Sue....Thank YouJune 11, 2011

history-Civil War
Sorry Sra...your sites didn't help..i was in sooo many sites last two days...no discussion found on this question..you don't know the answer to this ?June 11, 2011

History-Civil War
I'm confused on this question..isn't the question asking what dangers is Lincoln facing...I'm thinking dangers he's facing with the other politicians ..meaning the other politicians didn't agree with him and disliked him regarding his decisions when issuing...June 11, 2011